Window-shade fixture.



l. B. WOLFE.

WINDOW SHADE FIXTURE.

APPLICATION FILED nus.24. 1914.

1,138,166. mente@ May 4, 1915.

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IRA B. WOLFE, OF DERMOTT, ARKANSAS, ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, 0F ONE-FOURTH TO JAMES A. BENNETT, ONE-EIGH'IH TO "WILLIAM P. DANIELS,AND ONE-EIGrI-I'IH T0 WILLIAM A. DANIEIS, ALI( OF DERMOTT, ARKANSAS.

WINDOW-SHADE FIXTURE.'

T0 all ifi/1.0771, 'it may concern:

Be it known that I, IRA B. VVoLrE, a citizen of the United ta'tates, residing at Derinott, in the county of Chicot and State of Arkansas, have invented certain new and useful Improvements in Vindow-Shade Fixtures, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to certain new and useful improvements in window shade fixtures and has for its object ready and effective means for raising and lowering a spring shade roller with reference to the window, so that the vshade may screen the light at any desired altitude of the window.

l/Vith this end in view my invention consists in the details of construction and arrangement hereinafter described claimed, and shown in the drawing.

In order that the invention may be fully understood, I will proceed to describe the same referring by numerals to the accompanying drawing in which- Figure l is a front view of a window vframe equipped with my improvements.

Fig. 2 is a side elevation partly in section looking from the left of Fig. l, and Fig. 3

is a longitudinal section of the spring roller.

Similar reference numerals indicate like parts in the several figures of the drawing.

l represents an ordinary window frame to which the usual sashes are applied; 2 is a window shade suitably connected with an ordinary spring roller 3; and l and 5 are metallic cases of the design shown in side elevation, best shown at Fig. 2, open in front, with parallel sides and an integral back, or in other words, of U-form in cross section, and designed to be located upon rack bars 6, before said bars are permanently secured in place upon the Window frame by screws 7. I/Vithin the upper portion of the cases 4l and 5 spur wheels 8 are j ournaled by their hubs to the sides of the casing, theinner hub in each case having an axial rectangular recess for the purpose presently explained. Also pivoted to the sides of the casing 4, and below the spur wheel S, is a ratchet pawl 9, having two points of engagement, one with the rack bar 6, and the other with the spur wheel as clearly shown in Fig. 2. This pawl is provided with a Specification of Letters Fatent.

Application filed August 24, 1914.

and

Patented May d, 1915.

serial No. 858,302.

suitable hanging cord l() by means of which the pawl may be released, the pawl being returned to its locking position by a suitable spring l1. Bridging the two cases 4 and 5 is a telescopic shaft consisting of two sections 12 andlS, the former adjustable within the latter and fixed in any desired adjustment by a screw lll. rThe outer end of each section is provided with a short extension l5, adapted to be seated in the rectangular recesses in the hubs of the spur wheels 8. The section l2 is surrounded by a coil spring 16, one end l? being iixed in the said section and the opposite end fixed to the side of the casing 5, so that as the spur wheels are rotated by the racks 6 in the downward travel of the shaft the spring 16 will be put under torsional strain and will operate to return the roller upward when desired. This sectional shaft is inclosed within thin metal tubes 18 and 19 longitudinally adjustable one upon the other and constitute an ornamental covering for the roller. The inside faces of the casings et and 5 are formed near their lower extremities with bayonet slots 2O (see Fig. 2), adapted to receive the rectangular extension 2l of the ordinary shade spring roller 3. lVhile I have shown a single spring it will be understood that when a heavy or wide shade is used a double spring should be used instead of the spring 1G.

Having described the construction and arrangement of the several parts, I will now describe the operation. '.Ihe several parts being in positions shown at Fig. I with the shade screening the upper part of a window, and it being desired to screen the window at a lower location, the shade and its roller are pulled downwardly after the pawl 9 has been released by the cord 10; the roller 3 by reason of its connection with the cases l and 5, causes said cases to descend upon the rack bars 6, and by reason of the spur wheels 8 meshing with said bars both cases travel uniformly, and in view of the connections of the spring 16 with the telescopic shaft and the casing 5, the spring is subjected to torsion. It will be readily appreciated that the tension of the spring 16 is in excess of the tension of the spring 11 coacting with the pawl 9 whereby it will be perceived that it is essential to provide said pawl with the second point ot engagement or tail 22 to coact with a rack bar 6. The tail 22 is so disposed relative to the pawl 9 proper as to aiiord a pawl of substantial V shape and it is to be observe that the pivotal connection of the pawl with the case or carriage i is at the apex of said pawl, and itis to be further observed that said pawl is positioned below the spur wheel 8. When the shade has been located as desired the cord 10 is released, whereupon the spring 1l will cause the pawl 9 to interlock with the rack 6, and also the spur wheel 8, and hence the shade will be securely held in its adjusted position. Then it may be desired to raise the shade to any degree, the pawl 9,V is released and the spring in returning to its normal condition will cause the telescopic shaft to rotate and the spur wheels to which it is iixed will in an obvious manner climb the rack bar and necessarily carry with them, the cases 4 and 5, to which they are journaled, and the shade roller will be raised.

Many minor changes may be made in the mere details of construction without depart-v ing from the spirit of my invention.

`What l claim as new and desire to secure by Letters Patent is:

l. A shade fixture comprising, in combination, rack bars adapted to be mounted in ver tical position, carriages slidably engaged with each rof the rack bars, spur wheels rotatably supported by the carriages and in mesh with the rack bars, a spring roller operatively engaged with the spur wheels, said roller being adapted to be placed under tension upon movement vof the carriages in one direction, a pawl pivotally supported intermediate itsv length by one of the carriages and having its opposite extremities adapted for engagement with the adjacent spur wheel and with the adjacent rack, and means 'for imparting rocking movement to the pawl whereby it may be simultaneously disengaged from the spur wheel and the rack.

2. A shade iixture comprising, in combination, rack bars adapted to be mounted in yvertical position, carriages slidably engaged with each of the rack bars, spur wheels rotatably supported by the carriages and in mesh with the rack bars, a spring roller operatively engaged with the spur wheels, said roller being adapted to be placed under tension'upon movement of the carriages in one direction, a pawl pivotally supported intermediate its length by one of the carriages and having its opposite extremities adapted for engagement with the adjacent spur wheel and with the adjacent rack, means for imparting rocking movement to the pawl whereby it may be simultaneously disengaged from the spur wheel and the rack, and means for normally maintaining said pawl in engagement with the spur wheel and the rack.

3. A shade fixture comprising, in combination, rack bars adapted to be mounted in vertical position, carriages slidably engaged with each Aof the rack bars, spurwheels rotatably supported by the carriages and in mesh with the rack bars, a spring roller op'- eratively engaged with the spur wheels, said roller being adapted to be placed under tension upon movement of the carriages in one direction, a pawl pivotally supported intermediate its length by one of the carriages and having its opposite extremities adapted for engagement with the adjacent spur wheel and with the adjacent rack, and means for imparting rocking movement to the pawl whereby it may be simultaneously disengaged from the spur wheel and ther-ack,

said pawl being positioned below Vthe spur wheel. Y

4l. A shade ixture comprising, in combination, rack bars adapted to be mounted in vertical position, carriages slidably engaged with each of the rack bars, spur wheels r0- tatably supported by the carriages and in mesh with the rack bars, a spring roller operatively'engaged with the spur wheels, said roller being adaptedy to be placed under tension upon movement of the carriages in one direction, a V-shaped pawl pivotally sup ported at its apex by one of the carriages below the spur wheel and having its opposite extremities adapted for engagement with the adjacent spur wheel and with the adjacent rack, and means for imparting 'rocking movement tothe pawl whereby it may be simultaneously disengaged from the spur wheel and the rack. Y

In testimony lwhereof I hereunto aiiix my signature in the presence of two witnesses. i IRA B. VOLFE.

Witnesses:

ANNA M. DERMOTT, W. D TRoTTnR.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

